Can't download custom tunes

[Flats1]

I found out today my custom tunes were ready for download. So i'm trying to download the tunes but i'm getting a bunch of error messages. The first one that pops up when I hit update- custom file download internet. I get is a internet error incountered the page cannot be found. And then a message pops up saying process failed unable to loacte a valid target instruction file and then goes on to tell how that could happen. Then I click ok and then on the pegasus screen this comes up.
Unable to locate a Target Instruction file. Process failed
Update failed. Please contact your vendor for assistance

Can somebody help me? Is it something i'm doing wrong? Thanks Garret